package com.sky.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper<>();
        lqw.eq(Employee::getUsername, username);
        Employee employee = employeeMapper.selectOne(lqw);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 新增员工
     * @param employeeDTO
     */
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        employee.setStatus(StatusConstant.ENABLE);

        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 利用AOP已完成
//        Long currentId = BaseContext.getCurrentId();
//        employee.setUpdateUser(currentId);
//        employee.setCreateUser(currentId);
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        employeeMapper.insert(employee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //1 创建IPage分页对象,设置分页参数,第一个参数为当前页码，第二个参数为每页显示的记录数
        IPage<Employee> page=new Page<>(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        //2 执行分页查询
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper<>();
        lqw.orderByDesc(Employee::getCreateTime);
        lqw.like(null != employeePageQueryDTO.getName(), Employee::getName, employeePageQueryDTO.getName());
        employeeMapper.selectPage(page,lqw);

        // 封装分页结果
        long total = page.getTotal();
        List<Employee> records = page.getRecords();
        return new PageResult(total, records);
    }

    /**
     * 启用禁用员工账号
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        employeeMapper.update(employee);
    }
    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public EmployeeDTO selectById(Long id) {
        // 根据id查询员工信息
        LambdaQueryWrapper<Employee> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(Employee::getId, id);
        Employee employee = employeeMapper.selectOne(lambdaQueryWrapper);

        EmployeeDTO employeeDTO = new EmployeeDTO();
        BeanUtils.copyProperties(employee, employeeDTO);
        return employeeDTO;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }
}
